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EP0237641B1 - Comminuting plant for brittle material - Google Patents

Comminuting plant for brittle material Download PDF

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Publication number
EP0237641B1
EP0237641B1 EP86117585A EP86117585A EP0237641B1 EP 0237641 B1 EP0237641 B1 EP 0237641B1 EP 86117585 A EP86117585 A EP 86117585A EP 86117585 A EP86117585 A EP 86117585A EP 0237641 B1 EP0237641 B1 EP 0237641B1
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EP
European Patent Office
Prior art keywords
agglomerates
feed plate
impact elements
grinding
roller mill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86117585A
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German (de)
French (fr)
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EP0237641A3 (en
EP0237641A2 (en
Inventor
Gerhard Dipl.-Ing. Gudat
Manfred Dipl.-Ing. Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B02C21/005—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone

Definitions

  • the invention relates to a system (according to the preamble of claim 1) for crushing brittle regrind, such as cement clinker.
  • a system according to the preamble of claim 1 is known from EP-A 0 084 383.
  • the ground material is first subjected to single-grain size reduction and material bed size reduction in a roller mill using high pressure and the formation of agglomerates. These agglomerates are then dissolved in a device downstream of the roller mill, for example a tube mill, a spreading disc wind sifter or a classifying sifter.
  • a further grinding stage can also be provided for further comminution of the semolina resulting from the screening.
  • the invention has for its object to develop a system of the type required in the preamble of claim 1 so that with good dissolution of the agglomerates, improved economy, in particular reduced energy consumption, is achieved.
  • the high fine fraction of the regrind contained in the agglomerates is exposed and removed from the grinding system during the subsequent screening, so that this fine fraction no longer loads the following grinding stage.
  • the regrind feed plate is driven independently of the classifier's view organ, so that the screening and the dissolution of the agglomerates can be optimized independently of one another. In this way, the efficiency of the entire system is significantly improved, and by relieving the further size reduction, there is a considerable reduction in energy consumption.
  • the size reduction stage downstream of the classifier (generally a ball mill) can be dimensioned smaller in new plants and in existing plants (in which there is subsequently a deagglomeration of the regrind the sighting is provided) is loaded less.
  • the operation of the downstream comminution stage can also be better adapted to the operation of the roller mill in this embodiment according to the invention.
  • the grinding system shown in FIG. 1 for comminuting brittle ground material for example cement clinker, contains a roller mill 1, a classifier 2 with a built-in deagglomerator and a ball mill 3.
  • the roller mill 1 contains two rollers 4, 5, in the gap of which the millbase is subjected to single grain size reduction and material bed size reduction using high pressure and the formation of agglomerates.
  • the ground material discharged from the roller mill 1 is then fed to the classifier 2.
  • the classifier 2 (the details of which can be seen in FIG. 2) contains a rotating classifying system 7 in the upper part of the housing 6, which is driven by a shaft 8.
  • a rotating regrind feed plate 9 is arranged below the rotating viewing system 7 and is equipped with impact elements 10, 11 of different heights.
  • the grinding material feed plate 9 is driven from below by a shaft 12.
  • regrind feed plate 9 there is a feed hopper 13 to which the regrind is fed via a screw conveyor 14.
  • the classifying air enters in the lower area of the housing 6 via a nozzle 15 and then passes through a fixed blind ring 16.
  • the fine material is removed from the classifying air through the nozzle 17 and separated in a cyclone or filter (not shown in FIG. 1).
  • the semolina (arrow 23) are discharged from the housing 6 via a funnel 18 and fed to the ball mill 3. Their grains are again fed to the classifier 2 (arrow 19), while the fine material obtained in the ball mill 3 is drawn off with the mill exhaust air 20.
  • the regrind discharged from the roller mill i contains a high proportion of agglomerates (flakes). These agglomerates are largely dissolved in the sifter 2, specifically before they enter the classifying chamber 21, when the regrind on the rotating regrind feed plate 9 passes the impact elements 10 during the movement outwards. As a result of this dissolution of the agglomerates, the high fine fraction contained therein is exposed, carried upward by the classifying air (arrows 22) and separated in a cyclone or filter arranged downstream of the classifier 2. The ball mill 3 is therefore only loaded with the semolina accumulating in the classifier 2, but not with fines.
  • the screening and the dissolution of the agglomerates can be optimized independently of one another.
  • the regrind feed plate 9 ' which is also equipped with impact elements 10' on its circumference and is driven by a core shaft 8 ', is located within a further drum 24, which has circumference with impact elements 25 is occupied and is driven by an outer shaft 26.
  • the regrind is fed in via a feed hopper 13.
  • the speeds of the shafts 8 'and 26 can be selected differently. It is also possible that the outer drum 24 with the impact elements 25 is arranged to be stationary and only the regrind feed plate 9 'is driven.
  • the agglomerates formed in the roller mill 1 are thus effectively dissolved before the ground material is introduced into the classifying area 21 of the classifier 2.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)

Description

Die Erfindung betrifft eine Anlage (entsprechend dem Oberbegriff des Anspruches 1) zur Zerkleinerung von sprödem Mahlgut, wie Zementklinker.The invention relates to a system (according to the preamble of claim 1) for crushing brittle regrind, such as cement clinker.

Eine Anlage gemäß dem Oberbegriff des Anspruches 1 ist durch die EP-A 0 084 383 bekannt. Hierbei wird das Mahlgut zunächst in einer Walzenmühle unter Anwendung hohen Druckes und Bildung von Agglomeraten einer Einzelkornzerkleinerung und einer Gutbettzerkleinerung unterworfen. Anschließend werden diese Agglomerate in einer der Walzenmühle nachgeschalteten Einrichtung, beispielsweise einer Rohrmühle, einem Streutellerwindsichter oder einem Klassiersichter aufgelöst. Hierbei wird die zugleich desagglomerierende Wirkung eines Gerätes ausgenutzt, das primär für einen anderen Verfahrensschritt eingesetzt wird. Zur weiteren Zerkleinerung der bei der Sichtung anfallenden Grieße kann ferner eine weitere Mahlstufe vorgesehen sein.A system according to the preamble of claim 1 is known from EP-A 0 084 383. Here, the ground material is first subjected to single-grain size reduction and material bed size reduction in a roller mill using high pressure and the formation of agglomerates. These agglomerates are then dissolved in a device downstream of the roller mill, for example a tube mill, a spreading disc wind sifter or a classifying sifter. Here, the deagglomerating effect of a device that is primarily used for another process step is exploited. A further grinding stage can also be provided for further comminution of the semolina resulting from the screening.

Wird bei einer derartigen Anlage die Auflösung der Agglomerate in einem herkömmlichen Streuteller-Windsichter vorgenommen, so stellt dies eine zusätzliche Belastung des Streu- bzw. Aufgabetellers des Windsichters dar, so daß mit einer vollkommen unzureichenden Auflösung der Agglomerate gerechnet werden muß.If, in such a system, the agglomerates are dissolved in a conventional spreading plate wind sifter, this places an additional load on the spreading or feed plate of the wind sifter, so that a completely inadequate dissolution of the agglomerates must be expected.

Durch die Veröffentlichung 27TH IEEE CE-MENT INDUSTRY TECHNICAL CONFERENCE, New Orleans, Louisiana, 20.-23. Mai 1985, S. 1-11, Annexe 1-13, IEEE, New York, US (insbesondere Annexe 9 mit zugehöriger Beschreibung S. 6) ist weiterhin ein Vielkomponentensichter bekannt, bei dem unterhalb eines rotierenden Aufgabetellers ein von einem gesonderten Antrieb angetriebenes Sichtorgan angeordnet ist. Bei diesem Sichter wird das aus der Sichtzone abgezogene Feingut in mehrere Korngrößenfraktionen aufgesplittet. Dieser Sichter ist besonders dann geeignet, wenn ein kleiner Teil des gesamten Fertiggutes eine hohe Feinheit aufweisen soll.Through the publication 27TH IEEE CE-MENT INDUSTRY TECHNICAL CONFERENCE, New Orleans, Louisiana, 20.-23. May 1985, pp. 1-11, annexes 1-13, IEEE, New York, US (in particular annex 9 with associated description p. 6), a multicomponent sifter is also known in which, under a rotating feed plate, a viewing element driven by a separate drive is arranged. With this classifier, the fine material extracted from the classifying zone is split into several grain size fractions. This classifier is particularly suitable when a small part of the total finished product is to have a high degree of fineness.

Der Erfindung liegt die Aufgabe zugrunde, eine Anlage der im Oberbegriff des Anspruches 1 vorausgesetzten Art dahin weiterzuentwickeln, daß bei guter Auflösung der Agglomerate eine verbesserte Wirtschaftlichkeit, insbesondere ein verringerter Energieverbrauch, erreicht wird.The invention has for its object to develop a system of the type required in the preamble of claim 1 so that with good dissolution of the agglomerates, improved economy, in particular reduced energy consumption, is achieved.

Diese Aufgabe wird erfindungsgemäß durch das kennzeichnende Merkmal des Anspruches 1 gelöst.This object is achieved by the characterizing feature of claim 1.

Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Appropriate embodiments of the invention are the subject of the dependent claims.

Durch die Einwirkung der Prallelemente des rotierenden Mahlgut-Aufgabetellers wird der in den Agglomeraten enthaltene hohe Feinanteil des Mahlgutes freigelegt und bei der anschließenden Sichtung aus dem Mahlsystem entfernt, so daß dieser Feinanteil nicht mehr die folgende Mahlstufe belastet. Vorteilhaft wirkt sich hierbei ferner aus, daß der Mahlgut-Aufgabeteller unabhängig vom Sichtorgan des Sichters angetrieben ist, so daß die Sichtung und die Auflösung der Agglomerate unabhängig voneinander optimiert werden können. Auf diese Weise wird die Wirtschaftlichkeit der gesamten Anlage wesentlich verbessert, und durch die Entlastung der weiteren Zerkleinerungsstufe ergibt sich eine beachtliche Senkung des Energiebedarfes.Through the action of the impact elements of the rotating regrind feed plate, the high fine fraction of the regrind contained in the agglomerates is exposed and removed from the grinding system during the subsequent screening, so that this fine fraction no longer loads the following grinding stage. Another advantage is that the regrind feed plate is driven independently of the classifier's view organ, so that the screening and the dissolution of the agglomerates can be optimized independently of one another. In this way, the efficiency of the entire system is significantly improved, and by relieving the further size reduction, there is a considerable reduction in energy consumption.

Vorteilhaft ist ferner, daß durch die zuverlässige Auflösung der Agglomerate und die damit verbesserte Aussichtung des darin enthaltenen Feinanteils die dem Sichter nachgeschaltete Zerkleinerungsstufe (im allgemeinen eine Kugelmühle) bei Neuanlagen kleiner dimensioniert werden kann und bei bestehenden Anlagen (in denen nachträglich eine Desagglomeration des Mahlgutes vor der Sichtung vorgesehen wird) niedriger belastet wird. Auch der Betrieb der nachgeschalteten Zerkleinerungsstufe läßt sich bei dieser erfindungsgemäßen Ausführung besser dem Betrieb der Walzenmühle anpassen.It is also advantageous that, due to the reliable dissolution of the agglomerates and the improved viewing of the fine fraction contained therein, the size reduction stage downstream of the classifier (generally a ball mill) can be dimensioned smaller in new plants and in existing plants (in which there is subsequently a deagglomeration of the regrind the sighting is provided) is loaded less. The operation of the downstream comminution stage can also be better adapted to the operation of the roller mill in this embodiment according to the invention.

Die Erfindung ist in der Zeichnung beispielsweise veranschaulicht. Es zeigen

  • Fig. 1 ein Schema einer erfindungsgemäßen Mahlanlage,
  • Fig. 2 eine schematische Schnittdarstellung des Sichters (mit eingebautem Desagglomerator) der Anlage gemäß Fig.1,
  • Fig. 3 eine Variante des Desagglomerators.
The invention is illustrated in the drawing, for example. Show it
  • 1 is a diagram of a grinding plant according to the invention,
  • 2 shows a schematic sectional illustration of the classifier (with built-in deagglomerator) of the system according to FIG. 1,
  • Fig. 3 shows a variant of the deagglomerator.

Die in Fig. 1 dargestellte Mahlanlage zur Zerkleinerung von sprödem Mahlgut, beispielsweise Zementklinker, enthält eine Walzenmühle 1, einen Sichter 2 mit eingebautem Desagglomerator sowie eine Kugelmühle 3.The grinding system shown in FIG. 1 for comminuting brittle ground material, for example cement clinker, contains a roller mill 1, a classifier 2 with a built-in deagglomerator and a ball mill 3.

Die Walzenmühle 1 enthält zwei Walzen 4, 5, in deren Spalt das Mahlgut unter Anwendung hohen Druckes und Bildung von Agglomeraten eine Einzelkornzerkleinerung und eine Gutbettzerkleinerung erfährt.The roller mill 1 contains two rollers 4, 5, in the gap of which the millbase is subjected to single grain size reduction and material bed size reduction using high pressure and the formation of agglomerates.

Das aus der Walzenmühle 1 ausgetragene Mahlgut wird dann dem Sichter 2 zugeführt. Der Sichter 2 (dessen Einzelheiten aus Fig. 2 zu entnehmen sind) enthält im oberen Teil des Gehäuses 6 ein rotierendes Sichtsystem 7, das über eine Welle 8 angetrieben wird.The ground material discharged from the roller mill 1 is then fed to the classifier 2. The classifier 2 (the details of which can be seen in FIG. 2) contains a rotating classifying system 7 in the upper part of the housing 6, which is driven by a shaft 8.

Unterhalb des rotierenden Sichtsystemes 7 ist ein rotierender Mahlgut-Aufgabeteller 9 angeordnet, der mit Prallelementen 10, 11 unterschiedlicher Höhe besetzt ist. Der Antrieb des Mahlgut-Aufgabetellers 9 erfolgt von unten durch eine Welle 12.A rotating regrind feed plate 9 is arranged below the rotating viewing system 7 and is equipped with impact elements 10, 11 of different heights. The grinding material feed plate 9 is driven from below by a shaft 12.

Oberhalb des Mahlgut-Aufgabetellers 9 befindet sich ein Aufgabetrichter 13, dem das Mahlgut über eine Förderschnecke 14 zugeführt wird.Above the regrind feed plate 9 there is a feed hopper 13 to which the regrind is fed via a screw conveyor 14.

Die Sichtluft tritt im unteren Bereich des Gehäuses 6 über einen Stutzen 15 ein und durchsetzt dann einen feststehenden Jalousiekranz 16. Das Feingut wird von der Sichtluft durch den Stutzen 17 abgeführt und in einem (in Fig. 1 nicht dargestellten) Zyklon oder Filter abgeschieden.The classifying air enters in the lower area of the housing 6 via a nozzle 15 and then passes through a fixed blind ring 16. The fine material is removed from the classifying air through the nozzle 17 and separated in a cyclone or filter (not shown in FIG. 1).

Die Grieße (Pfeil 23) werden über einen Trichter 18 aus dem Gehäuse 6 ausgetragen und der Kugelmühle 3 zugeführt. Deren Grieße werden erneut dem Sichter 2 zugeleitet (Pfeil 19), während das in der Kugelmühle 3 anfallende Feingut mit der Mühlenabluft 20 abgezogen wird.The semolina (arrow 23) are discharged from the housing 6 via a funnel 18 and fed to the ball mill 3. Their grains are again fed to the classifier 2 (arrow 19), while the fine material obtained in the ball mill 3 is drawn off with the mill exhaust air 20.

Aufgrund der in der Walzenmühle 1 erfolgenden Gutbettzerkleinerung enthält das aus der Walzenmühle i ausgetragene Mahlgut einen hohen Anteil von Agglomeraten (Schülpen). Diese Agglomerate werden im Sichter 2, und zwar vor ihrem Eintritt in den Sichtraum 21, weitgehend aufgelöst, wenn das Mahlgut auf dem rotierenden Mahlgut-Aufgabeteller 9 bei der Bewegung nach außen die Prallelemente 10 passiert. Durch diese Auflösung der Agglomerate wird der darin enthaltene hohe Feinanteil freigelegt, von der Sichtluft (Pfeile 22) mit nach oben geführt und in einem dem Sichter 2 nachgeschalteten Zyklon oder Filter abgeschieden. Die Kugelmühle 3 wird daher lediglich mit den im Sichter 2 anfallenden Grießen, nicht dagegen mit Feingut belastet.Due to the material bed comminution taking place in the roller mill 1, the regrind discharged from the roller mill i contains a high proportion of agglomerates (flakes). These agglomerates are largely dissolved in the sifter 2, specifically before they enter the classifying chamber 21, when the regrind on the rotating regrind feed plate 9 passes the impact elements 10 during the movement outwards. As a result of this dissolution of the agglomerates, the high fine fraction contained therein is exposed, carried upward by the classifying air (arrows 22) and separated in a cyclone or filter arranged downstream of the classifier 2. The ball mill 3 is therefore only loaded with the semolina accumulating in the classifier 2, but not with fines.

Da das Sichtsystem 7 und der Mahlgut-Aufgabeteller 9 über gesonderte Wellen 8 bzw. 12 angetrieben sind, können die Sichtung und die Auflösung der Agglomerate unabhängig voneinander optimiert werden.Since the viewing system 7 and the regrind feed plate 9 are driven via separate shafts 8 and 12, the screening and the dissolution of the agglomerates can be optimized independently of one another.

Bei dem in Fig. 3 dargestellten abgewandelten Ausführungsbeispiel des Desagglomerators befindet sich der an seinem Umfang gleichfalls mit Prallelementen 10' besetzte Mahlgut-Aufgabeteller 9', der über eine Kernwelle 8' angetrieben wird, innerhalb einer weiteren Trommel 24, die an ihrem Umfang mit Prallelementen 25 besetzt ist und durch eine äußere Welle 26 angetrieben wird. Die Aufgabe des Mahlgutes erfolgt über einen Aufgabetrichter 13.In the modified embodiment of the deagglomerator shown in FIG. 3, the regrind feed plate 9 ', which is also equipped with impact elements 10' on its circumference and is driven by a core shaft 8 ', is located within a further drum 24, which has circumference with impact elements 25 is occupied and is driven by an outer shaft 26. The regrind is fed in via a feed hopper 13.

Die Drehzahlen der Wellen 8' und 26 können unterschiedlich gewählt werden. Möglich ist auch, daß die äußere Trommel 24 mit den Prallelementen 25 feststehend angeordnet wird und lediglich der Mahlgut-Aufgabeteller 9' angetrieben ist.The speeds of the shafts 8 'and 26 can be selected differently. It is also possible that the outer drum 24 with the impact elements 25 is arranged to be stationary and only the regrind feed plate 9 'is driven.

Auch bei dem in Fig. 3 dargestellten Ausführungsbeispiel erfolgt damit eine wirksame Auflösung der in der Walzenmühle 1 gebildeten Agglomerate vor Eintrag des Mahlgutes in den Sichtraum 21 des Sichters 2.In the exemplary embodiment shown in FIG. 3, the agglomerates formed in the roller mill 1 are thus effectively dissolved before the ground material is introduced into the classifying area 21 of the classifier 2.

Claims (4)

1. Apparatus for crushing brittle material for grinding, containing
a) a roller mill in which the material for grinding is subjected to individual grain crushing and material bed crushing at high pressure and with agglomerates being formed.
b) a separator (2) which is arranged after the roller mill (1) with at least one rotating separating device (7), the agglomerates formed in the roller mill being broken up in the separator,
c) a grinding stage (3) for further crushing of the tailings produced in the separation
characterised in that
e) the arrangement for breaking up agglomerates is formed by a rotating material feed plate (9), which is provided with impact elements (10, 11), is arranged below the rotating separating device (7) and is driven independently of this separating device.
2. Apparatus as claimed in claim 1, characterised in that the material feed plate (9) is provided with impact elements (10, 11) of differing height.
3. Apparatus as claimed in claim 1, characterised in that the material feed plate (9') which is provided on its periphery with impact elements (10') is driven by .a core shaft (8') and is arranged inside a drum (24) which is provided on its periphery with impact elements (25).
4. Apparatus as claimed in claim 1, characterised in that the grinding stage for further comminution of the tailings produced in the separation is formed by a ball mill (3).
EP86117585A 1986-03-19 1986-12-17 Comminuting plant for brittle material Expired - Lifetime EP0237641B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863609229 DE3609229A1 (en) 1986-03-19 1986-03-19 METHOD AND SYSTEM FOR CRUSHING SPROEDEM GROUND MATERIAL
DE3609229 1986-03-19

Publications (3)

Publication Number Publication Date
EP0237641A2 EP0237641A2 (en) 1987-09-23
EP0237641A3 EP0237641A3 (en) 1988-07-27
EP0237641B1 true EP0237641B1 (en) 1990-08-29

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EP86117585A Expired - Lifetime EP0237641B1 (en) 1986-03-19 1986-12-17 Comminuting plant for brittle material

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US (1) US4732334A (en)
EP (1) EP0237641B1 (en)
DE (2) DE3609229A1 (en)
ES (1) ES2017626B3 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712147A1 (en) * 1987-04-10 1988-10-20 Krupp Polysius Ag METHOD AND SYSTEM FOR CRUSHING SPROEDEM GROUND MATERIAL
DE3815217A1 (en) * 1988-05-04 1989-11-16 Pfeiffer Christian Maschf METHOD FOR CRUSHING SPROEDEM GROUND
DE3822729A1 (en) * 1988-07-05 1990-01-11 Krupp Polysius Ag PLANT FOR SHREDDING SPROEDEM GROUND
DE3843338A1 (en) * 1988-12-22 1990-06-28 Krupp Polysius Ag SAFE
DD298600A5 (en) * 1989-09-15 1992-03-05 Forschungsinstitut Fuer Aufbereitung,De TUBE BALL MILLS FOR EFFECTIVE DESAGGLOMERATION AND CRUSHING OF HIGH PRESSURE CRUSHED SPROEDEN MATERIAL
DE4005323A1 (en) * 1990-02-20 1991-08-22 Krupp Polysius Ag Crushing plant for cement material - involves first stage accepting pre-crushed material, and feeding to second stage with constant output regulation
DK167054B1 (en) * 1990-11-26 1993-08-23 Smidth & Co As F L DOUBLE SEPARATOR FOR SEPARATION OF PARTICULATE MATERIAL
DE4124416A1 (en) * 1991-07-23 1993-01-28 Krupp Polysius Ag DEVICE AND METHOD FOR CRUSHING GROUND DIFFERENT GRAIN
ATE175594T1 (en) * 1992-10-20 1999-01-15 Waeschle Maschf Gmbh DEVICE AND METHOD FOR CLEANING A GRAIN MIXTURE THAT IS ESSENTIALLY IN GRANULAR FORM
BRPI1004773B1 (en) * 2010-11-22 2020-12-08 Edinez Bilk silo for separating gravel sand from powdery material

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1757161B1 (en) * 1968-04-06 1971-10-21 Steinmueller Gmbh L & C Impact mill
US4597537A (en) * 1982-09-14 1986-07-01 Onoda Cement Company, Ltd. Vertical mill
DE3302176A1 (en) * 1983-01-24 1984-07-26 Klöckner-Humboldt-Deutz AG, 5000 Köln METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROUND MATERIAL
DE3314103A1 (en) * 1983-04-19 1984-10-25 Klöckner-Humboldt-Deutz AG, 5000 Köln METHOD AND INSTALLATION FOR THE COMMON GRINDING OF TWO OR MORE DIFFERENTLY GROUNDABLE SPROEDER SUBSTANCES
GB8327201D0 (en) * 1983-10-11 1983-11-09 Croft Impresa Ltd Obtaining comminuted product from solid feed material
DE3337615A1 (en) * 1983-10-15 1985-04-25 Klöckner-Humboldt-Deutz AG, 5000 Köln Process and plant for comminuting, grinding and treating raw mineral materials, such as ores and the like, which are wet from the mine or naturally
DE3343788A1 (en) * 1983-12-03 1985-06-13 Bert 5470 Andernach Steffens Process and apparatus for the separation of products or mixtures of fibrous materials and non-fibrous materials
JPS60231447A (en) * 1984-04-27 1985-11-18 日本セメント株式会社 Cement crushing method
DE3504584A1 (en) * 1985-02-11 1986-08-21 Krupp Polysius Ag, 4720 Beckum Device for comminuting material for milling
DE3506486A1 (en) * 1985-02-23 1986-08-28 Klöckner-Humboldt-Deutz AG, 5000 Köln DEVICE FOR CRUSHING AND GRINDING SPROEDEN GROUND MATERIALS, FOR EXAMPLE Cement clinker, ore, coal or the like

Also Published As

Publication number Publication date
ES2017626B3 (en) 1991-03-01
DE3673808D1 (en) 1990-10-04
EP0237641A3 (en) 1988-07-27
DE3609229A1 (en) 1987-09-24
EP0237641A2 (en) 1987-09-23
US4732334A (en) 1988-03-22

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